merging changes from OPAE branch making this branch

driver/sw/simx/Makefile

@@ -0,0 +1,37 @@
+CFLAGS += -std=c++11 -O3 -Wall -Wextra -pedantic -Wfatal-errors
+#CFLAGS += -std=c++11 -g -O0 -Wall -Wextra -pedantic -Wfatal-errors
+
+MAX_WARPS ?= 8
+MAX_THREADS ?= 4
+
+CFLAGS += -I../../include -I../../../../simX/include
+
+CFLAGS += -fPIC
+
+CFLAGS += -DUSE_SIMX 
+
+CFLAGS += -DMAX_WARPS=$(MAX_WARPS) -DMAX_THREADS=$(MAX_THREADS)
+
+LDFLAGS += -shared -pthread
+
+SRCS = vortex.cpp ../vx_utils.cpp ../../../simX/args.cpp ../../../simX/mem.cpp ../../../simX/core.cpp ../../../simX/instruction.cpp ../../../simX/enc.cpp ../../../simX/util.cpp
+
+RTL_TOP = ../../../simX/cache_simX.v
+
+RTL_INCLUDE = -I../../../old_rtl -I../../../old_rtl/interfaces -I../../../old_rtl/cache -I../../../old_rtl/shared_memory
+
+THREADS ?= $(shell python3 -c 'import multiprocessing as mp; print(max(1, mp.cpu_count() // 2))')
+VL_FLAGS += --threads $(THREADS)
+
+VL_FLAGS += -Wno-UNOPTFLAT -Wno-WIDTH 
+
+PROJECT = libvortex.so
+
+all: $(PROJECT)
+
+$(PROJECT): $(SRCS) 
+	verilator --exe --cc $(RTL_TOP) $(RTL_INCLUDE) $(VL_FLAGS) $(SRCS) -CFLAGS '$(CFLAGS)' -LDFLAGS '$(LDFLAGS)' -o ../$(PROJECT)
+	make -j -C obj_dir -f Vcache_simX.mk
+
+clean:
+	rm -rf $(PROJECT) obj_dir